Purpose

The purpose of this study is to develop a novel rectangular linear induction motor as an electromagnetic stirrer (EMS) using analytical followed by a numerical approach. The rectangular linear electromagnetic stirrer (RLEMS) is mainly developed for rectangular slab and billet as the end product.

Design/methodology/approach

A two-dimensional analytical approach for evaluating flux density distribution within the mold is established for RLEMS structure. Subsequently, the average stirring force within the mold is estimated from those field variables. The paper presents an analytical and numerical model for calculating the stirring force and counters the end and edge effects of linear-type EMS. Magnetic field and force profile within the mold due to polyphase rectangular stator distribution has been done with the help of Maxwell’s equation with appropriate boundary conditions by using Fourier transform and inverse Fourier transform. Subsequently, a numerical study has been carried out using a coupled thermal and electromagnetic model.

Findings

The present study investigates the physical phenomena during the solidification process because of an induced electromagnetic field and is able to extract all the electromagnetic field variables under different operating conditions, and, subsequently, provides an insight into the actual happening within the mold.

Originality/value

It provides the analytical method for solving the stirring force of the proposed new RLEMS structure by addressing the smooth and efficient variation of field and velocity profile near the corner of the mold and improves the quality of end product.

中文翻译：

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矩形线性电磁搅拌器的电磁场解析建模及性能研究

目的

本研究的目的是开发一种新型矩形直线感应电机作为电磁搅拌器 (EMS)，使用分析方法和数值方法。矩形线性电磁搅拌器（RLEMS）主要针对矩形板坯和方坯作为最终产品而开发。

设计/方法论/方法

建立了一种用于评估模具内磁通密度分布的二维分析方法，用于 RLEMS 结构。随后，模具内的平均搅拌力从这些场变量中估计出来。该论文提出了一种用于计算搅拌力和对抗线性 EMS 的端部和边缘效应的解析和数值模型。由于多相矩形定子分布，模具内的磁场和力分布已在麦克斯韦方程的帮助下通过傅里叶变换和傅里叶逆变换在适当的边界条件下完成。随后，使用耦合热和电磁模型进行了数值研究。

发现

本研究调查了凝固过程中由感应电磁场引起的物理现象，并能够提取不同操作条件下的所有电磁场变量，并随后深入了解模具内的实际情况。

创意/价值

它通过解决模具拐角附近场和速度剖面的平滑有效变化，为解决所提出的新型 RLEMS 结构的搅拌力提供了分析方法，并提高了最终产品的质量。